People often use HBWR because it's easier to deal with just a few seeds as apposed to hundreds of MG seeds, especially when one doesn't have the proper equipment to grind all the seeds.
If you do a proper extraction, the difference between MG and HBWR is minimal.
HBWR supposedly contains a lot of oils that are toxic so a proper extraction is best.
If you extract LSA, you’ll find HBWR is a better choice. Extraction is easier with HBWR, and you get more product from it. Cost wise, for extraction purposes, HBWR has always been the best choice. But if you can get MG at 1/30nth the cost of HBWR then it would be a good option.
1 HBWR seed weighs about 106 mg. They contain about 3.05 % alkaloids.
1 MG seed weighs about 35 mg. They contain about 0.1% alkaloids.
1 gram of HBWR seeds contains about 3 mg of alkaloids and amounts to only about 10 seeds.
1 grams of MG seeds contains about 0.1 mg of alkaloids and amounts to about 28 seeds.
Ok so that means on a potency bases 1 gram of HBWR seeds (10 seeds) are equivalent to 30 grams of MG seeds (857 seeds)! That’s a lot of seeds.
So you could either eat 10 seeds of HBWR, or 857 seeds of MG for roughly the same experience. 10 HBWR seeds would be WAY TOO MUCH for SWIM, but some people eat that much. For SWIM 5 HBWR seeds are nearly too much.
(EDIT: I'm talking about the Hawaiian strain of HBWR, not the Ghana strain or any other lower potency strain)