It's been ~15 years since I did much with 78xx's, but I seem to recall the various package types were all pretty much the same on thermal coefficients, and othe

It's been ~15 years since I did much with 78xx's, but I seem to recall the various package types were all pretty much the same on thermal coefficients, and other related specs. It's a decades-old design that has been pretty well optimized at this point. The 2A versions also have slightly bigger leads, which may not fit in through-holes not sized for them originally.