They might I don't know. I do know that the two are completely different wheels. The Jegs wheels are cast, which means they are heavier, and won't shine as well. They also take different lugnuts.
I have two sets of the summit stars, one for the street, one for the track, I had weld draglites on my fox before. They may weigh maybe a little bit more, but as far as the shine I cant tell no difference. And no the center caps arent the same unless you do some you do some custom trimming w/ a drimmel. I got the whole set for around 500 shiiped lug nuts and all. You really cant beat that....Im happy w/ mine.
Maybe so..I guess it just depends on how cost minded you are. If my car was five lug I might have gone with welds. I liked the prostar look so the summit stars was a no brainer option.
I go into Jegs all the time and I think the Weld copies made for them look really nice and the weight difference is not probably a issue for 90% of the people. People just liked the looks of the Welds and the weight was just a bonus.