East Coast bodyshells - which does what best?

[colmo]

I've been looking around for budget BRCA approved shells, and came upon the East Coast brand, which Schumacher are distributing.

They have 4 shells approved for BRCA use -
EC16283121: IS250 (Lexus IS250),
EC16283122: Euro-R (Mugen Accord),
EC16283123: 320Si (BMW 320Si),
EC16283126: Speed6 (Mazda 6)

I haven't been able to find anything about their different handling characteristics (and thus track type suitability), but perhaps their similarity to shells from other brands would allow some educated guess work?

I know little about Touring Car racing, so was hoping I could pick some Oople brains.