I have used two sets of those wheels in the past [15"] and never had a problem with repro hubcaps [never used originals]. I can't imagine that they have changed the wheel. Now, it does take a pretty good smack with the palm of your hand to seat them. If you hit the edge of the cap a good firm smack it won't dent the cap [at least mine didn't]. Don't use a mallet. My brother has a couple of F1's with original wheels and he has a problem keeping the repro caps on the wheels.
I smacked it with the palm of my hand very hard without success. I am going to strip the tire off and send one of them to Vintique. All 4 wheels are the same.
I did resolve my hubcap fit problem. I worked with Wheel Vintiques. I sent them one of the wheels (that I bought thru Summit Racing and they supply to Summit), one of my Bob Drake supplied reproduction hubcaps and an original hubcap. They agreed that the 2 hubcaps that I sent did not fit the wheel but their reproduction hubcaps do fit. I bought 4 of their reproduction hubcaps. They sent my wheel back paying the shipping. Had I thought that there could be a slight difference in the reproduction cap, I would not have even sent the wheel. They were great to work with, problem resolved.