Hey guys , im looking at these  anti roll bar drop links . http://pages.ebay.com/link/?nav=item.view&id=271976454979&alt=web 
They seem to look alot thicker than the old current ones on my 90 mr2.
 
My question is will it make any difference to the handling ?   

I installed them in the front of my previous Gen3, they seemed fine.
Don't think the thickness would affect handling, as they don't flex...

If your old links are still in good condition the links you mentioned wont change your handling.
 
However these are good gear.
I have them on my car and they are well made replacements that look to be the same design as the stock later model OEM units that are thicker than the early model OEM links that tended to bend or break.