Recommendation for weatherstripping please

I'm afraid I cannot determine what you have based on your picture. There is a lot more that goes into identifying wool pile. We would need to see a sample of the original, specifically its end profile. We would also need to know the size of its end profile.

Wool pile isn't necessarily better than bubble seal, and vice versa. They both work equally well, but you want to use them in different circumstances. Without knowing more specific details about your original seal, I do not know what would be better for your window.