Yes, most TE and all TE2 and ATA are both of HIPS. If HIPS cracks it means that the maker overheated the plastic before forming. Both my TD and TK are TE2 and are holding up well, though I have gotten some small tears when I tried doing some aggressive maneuvers. My take having owned both ABS & HIPS is that ABS will take more abuse for sure, but HIPS will do fine for normal trooping.
Also, HIPS can be lower cost at times but this depends on the maker and the fluctuating prices of the two different plastics.
My advice is to first decide on which armor best suits you based on your needs (as there is no one 'best' armor), then go after contact info.