ET and HP, a GT4088 is awful similar. Ran both a 366 and a GT4088 with no other changes, and the 88 was 0.1" slower, and 10rwhp down, IIRC. The 366 was a HighTech brand charger.
I am looking for one to be run in around 650-700 HP and be a daily driver and still be able to tow my ATV around.
The 4094r is looking like a good option .
I didn't like the gt4094's when I installed one and rode in my friends truck here in AZ few years ago. Laggy, higher egt's than stock and high drive pressure.
My old boss ran a 4094r on his LLY with some 50hp DDP nozzles and some efi tuning a couple years ago and I wasn't impressed. Seemed pretty slow to spool.
dont waste your time with small framed garret turbos. i had a 4088r and other than the whistle it sucked performance wise. go with a nice size borg warner