block is basically the same just with the oil squitters , which doesn't make much difference , the difference is the compression of the pistons , if wanna turbocharge the gti engine , make sure to use the gsr pistons to be on the safe side .
yes, 93T block is stronger. Crank and conrods are also suppose to be different i.e. stronger. 93T also has a small water-oil heat exchanger and the relevant plumbing to make it work in the block... urm, taught we answer this before.