Emily, I do not recall if it has the larger coupler. I would never double head this engine so it never occurred to me to look.
I understand your perspective on the size differences and level of detailing. But even this Premier 3 rail (high rail) engine has some flangeless wheels so it can take 72 in diameter curves. If you went with scale wheels you would need a much larger curve diameter because all the wheels for 2/3 rail scale will have flanges. If you take into account the larger coupler, that certainly is not scale, compromises have to be made. On the other hand the scale couplers have a curved metal bar which to me looks totally out of place and not scale. So which to choose?
As with everything, we are able to participate in the hobby at different levels depending on our financial resources and available layout space. The Rail King was in fact a nice engine for its intended market. Coupled with a set of Rail King passenger cars it looked very nice running. The Premier line is directed at people who have the space, money and interest to play with more detailed models.
The engine model in your post is for a PS2 engine, check out the difference with 20-3484-1. wheels are painted, restraining chains on the tender trucks etc. All for just under $1100 MSRP.
I happened to get very lucky picking up this 20-3751-1 for $535 in 2019. Everything MTH Premier has jumped in price in the last year or so, to the point old stuff is approaching new prices, sometimes selling for more. If you want the PS3 engines I think you will need to raise your purchase budget.
Lastly don't compromise on picking up something at a lower price which you will be ultimately unhappy. Better to wait and save for something which will make you happy and be pleased with long term. Good luck finding the right engine for you.
