Since both MTH and Lionel's latest/recent catalogs contain additional AFT cars, I decided to update my chart so I don't end up purchasing duplicates. No guarantees on accuracy!
This is a listing by AFT car number:
AFT Car List Car Number Type K-Line Lionel MTH
------------------------ ---------- ------------------------- ---------------------------- ------- --------
Tool Car PNWC76 6-axle, 80' baggage/dorm
Storage/laundry Car 20/33 NYC #9133 baggage
Flat Car 30 F85C TTX flatcar
Flat Car 31 F85C TTX flatcar
Flat Car 32 F85C TTX flatcar
Baggage Car 33 20-64215
Storage Car "Boxcar" 33/34 SR #545 baggage 20-64215
Showcase Car 40 NYC #9137 baggage K-1122, K-4601A, K4601-30040
Showcase Car 41 NYC #9152 baggage K-1122, K-4601A, K4601-30041
Entrance "Control" Car 100 NYC #9163 baggage 6-84226 20-64213
Display Car 101 NYC #9128 baggage K-1122, K-4601A, K4601-30101 6-83111
Display Car 102 NYC #9158 baggage K4601-30102 6-83111
Display Car 103 NYC #9178 baggage K4601-30103 6-83111
Display Car 104 NYC #9115 baggage K4601-30104 6-83116
Display Car 105 NYC #9135 baggage K4601-30105 6-83116 30-68049
Display Car 106 NYC #9156 baggage K4601-30106 6-83589
Display Car 107 NYC #9138 baggage K4601-30107 6-83589
Display Car 108 NYC #9139 baggage K4601-30108 6-83592
Display Car 109 NYC #9165 baggage K4601-30109 6-83592
Display Car 110 NYC #9104 baggage K-1122, K-4601A, K4601-30110 6-84226
Exit Car/Power Car 111 NYC 9100 series K4601-30111 6-83111 30-68048
Power/"Bunk" Car 200 NYC 9100 series
"Sleeping" Car 201 SP 85' 4-4-2 Pullman #9111 K-4601B 6-83119 30-68047
Combo/"Pie Car" 202 Reading 72' CVM pas/bag K-4601B 2027340
Lounge/"Bar Car" 203 Reading 72' PBM coach K-4601B 2027340 30-68047
Hospitality/"Office Car" 204 Reading 72' PBM coach K-4601B 2027350
Observation/"Press Car" 205 Reading 72' PBM coach K-1122, K-4601A, K4601-30205 2027350
Diner 207 30-67482, 20-64214
Observation Car 208 20-64213
Coach 210 20-64215
Coach # 1 212 20-64213
Coach # 2 214 20-64213
Sleeper 220 20-64214
Vista Dome Car ??? 20-64216
And I created this one by manufacturer SKU:
K-Line AFT Numbering
--------------------
K-1122 - American Freedom Train Passenger Set (GS-4 loco & tender; #40, #41, #101, #110, #205)
K-4601A - American Freedom Train Passenger Car 5-PAC (#40, #41, #101, #110, #205)
K-4601B - American Freedom Train Crew Car 4-PAC (#201, #202, #203, #204)
K4601-30040 - AFT Showcase Car #40, 18"
K4601-30041 - AFT Showcase Car #41, 18"
K4601-30101 - AFT Showcase Car #101, 18"
K4601-30102 - AFT Display Car #102, 18" "Exploration and Expansion" 1796-1806 & 1806-1816
K4601-30103 - AFT Display Car #103, 18" "Growth of the Nation" 1816-1826 & 1826-1836
K4601-30104 - AFT Display Car #104, 18" "Origins" 1836-1846 & 1846-1856
K4601-30105 - AFT Display Car #105, 18" "Innovations" 1856-1866 & 1866-1876
K4601-30106 - AFT Display Car #106, 18" "Human Resources" 1876-1886 & 1886-1896
K4601-30107 - AFT Display Car #107, 18" "Sports" 1896-1906 & 1906-1916
K4601-30108 - AFT Display Car #108, 18" "Performing Arts" 1916-1926 & 1926-1936
K4601-30109 - AFT Display Car #109, 18" "Fine Arts" 1936-1946 & 1946-1956
K4601-30110 - AFT Display Car #110, 18" 1956-1966 & 1966-1976
K4601-30111 - Museum of America's Freedom Trains Display Car #111 1976-1986 & 1986-1996
K4601-30201 - AFT Pullman Sleeper #201, 18"
K4601-30202 - AFT Diner #202, 18"
K4601-30203 - AFT Lounge Car #203, 18"
K4601-30204 - AFT Parlor Car #204, 18"
K4601-30205 - AFT Observation Car #205, 18"
Lionel AFT Numbering
--------------------
6-83111 - American Freedom Train 21" Passenger Car 4-Pack (Exhibit Cars 101, 102, 103, Power Car 111 with generator sounds)
6-83116 - American Freedom Train 21" Passenger Car 2-Pack (Exhibit cars 104 & 105)
6-83119 - American Freedom Train 21" StationSounds Exhibit Car (Sleeper Car 201)
6-83589 - American Freedom Train 2-Pack #1 (Exhibit Cars 106 & 107)
6-83592 - American Freedom Train 2-Pack #2 (Exhibit Cars 108 & 109)
6-84226 - American Freedom Train Add-On 2-Pack #4 (Exhibit Cars 100 & 110)
2027340 - American Freedom Train 18" Passenger Car 2-Pack 1 (Diner Car # 202 and Lounge Car # 203)
2027350 - American Freedom Train 18" Passenger Car 2-Pack 2 (Parlor Car # 204 and Observation Car # 205)
MTH AFT Numbering
-----------------
20-64213 - American Freedom Train 70' ABS Passenger Set (Smooth) (4 Cars: 100 [Baggage Car]; 208 [Observation Car]; 212 [Coach # 1]; 214 [Coach # 2] )
20-64214 - American Freedom Train 70' ABS Sleeper/Diner Passenger Set (Smooth) (2 Cars: 207 [Diner]; 220 [Sleeper] )
20-64215 - American Freedom Train 70' ABS Baggage/Coach Passenger Set (Smooth) (2 Cars: 33 [Baggage] ;210 [Coach] )
20-64216 - American Freedom Train 70' ABS Full Length Vista Dome Passenger Car (Smooth) (unnumbered AFT car)