The td05h 16g6 i have is a very different animal to the scooby version mate,twin scroll, reverse rotation bigger exhaust and compressor housings.Been through 10+ years of "evolution"
take a look at this pic,
there both td05h 16g6 turbo's but there not all built the same!
Go with what Bill recommends mate,the only thing i'd like to have is a T3 flange so that if i wanted i could upgrade to gt30 etc and i think the gt2871 comes with a t25 flange.Talk to Bill