For those that may want to defend their fav hpop manf or the one they are running: This is not about quality of the pumps. They are all good pumps. In fact every HPOP offered from Swamps Gen3, BTS duals, DS Adrenaline, terminators, The various Stealths are all high quality pumps. But you can have the highest quailty pump in the world and if it does not flow what you need or with hopefully a bit in reserve then its not getting the job done. The pump you need is the one that when your tune calls for 3000 PSI at WOT where you have the maximum pw of fuel being injected it can hold that oil pressure there for as long as you hold the throttle there. End of story.
Different pumps for different needs and as the needs go up so usually does the cost of the pump that can meet those needs. At the bottom of the heap in flow is the stock 15 degree, then the 17 degree, next the slightly modded pumps like Terminator offers, Then you have T500 and Adrenaline In no particular order there and for good reason), next is the Stealth Stage I and SRP1, After that you have basically all the duals and the larger Stealths. I WILL NOT put these in any order as it will without a doubt get some immature person all butt hurt and then all the BS and drama that flows: Terminator duals, BTS Duals, Swamps Gen 3, Stealth Stage II and III, Old Stealth Duals
Adrenaline size pumps seem to hold pressure for Stock split shots,stage II, and 100% hybrids. Stealth SRP1 work for all the previous and also for 200% Hybrids and is also on a set of fast 400% but I have not personally seen log numbers for it but heard its doing fine. Then lastly all the various duals and stage II and III stealths support the big boys large nozzle B-codes, 400% and up nozzled hybrids that are currently being fielded etc..
The one thing going to a larger pump setup can also get you even if a smaller one may hold your max ICP is faster ramp up to those pressures. This is usually seen in throttle response.
That is as best I can work out the order and ranking for flow rates and capacities of various pumps