For me, Sharwil was a stand out and the best avo I've had. It wasn't just a single fruit, they were both that good. I'll definitely need some scion from you next year of that Brad, my Brokaw Hass is actually kicking ass even though it got snowed on pretty bad. Is Sir Prize really that bad? If so, I could top work that tree too. I am super surprised with how well avos are doing at my house.
Sir prize has a lot of issues. Fruits too much, or wont fruit at all, weak growth,.. sun burn, sagging brwnches... Fruit can be good, can also be mediocre. Inconsistent... its pretty useless. I had 2 trees and top worked them both with sharwil. It may be better for somewhere with less heat, I cant say fornsure but it is definitely not a top tier tree.
Heres the only catch with sharwil. It seems to need a lot of heat to grow well. It may or may not do well there, you will just have to try it. Its doing well here but some others I know it hasnt performed well for them.