Well, Rick did update the costume a bit. I have to say I'm a fan of the Hourman costume either way. It's a little silly, but it has a good visual, and it's quite fitting for the kind of guys the two Tylers are.
As it stands, I'd still say there are some more overt differences - even if I have to admit Rick doesn't always get the chance to show it over in JSA. The two Doc's are quite similar in demeanour and look, but Pieter's had the benefit of characterisation. Of the early JSA'ers, I think McNider is one of the least developed, ain't he?