I sometimes see tren hexahydrobenzylcarbonate being offered (BD trenabol depot 100 for instance). But it has about the same half-life as enanthate and it's more expensive.
anyway, parabolan powder is the same as tren enanthate in terms of price. harder to find on the UG market though. it will take longer to kick considering the longer ester...but you dont have to worry at all about blood level fluctuation during the week.
if you're doing a long-ass cycle, parabolan is a good idea, but not really much different than tren enan. in the past, i think people liked the idea of using human grade (real Parabolan) amps, but considering it's no longer made, that's a moot point.
Years ago it was a "designer AS", today it's not any different in terms of results than any other long ester tren. But I'm not a fan of long ester tren.