Incredibloom does claim to produce better growth/flowers etc but personally I like flower power better. Apricot shades never worked for me and I got weedy flowers (not the huge basketfuls shown on the promos), T&M plants tend to die on me anyway. I find that "garden ready" can mean little more than a plug plant or a decent sized big plant depending on the supplier and I have also found that begonias grown from tubers produce far better plants and flowers than the actual little plants. It's a lot more effort though to grow tubers/corms.
Not going for this, I'd rather have the P2G TSV (if I was buying more plants which I'm not intending to).
CC