BLC2, H335 and A2230 are all spherical. BLC2 is very similar to your 748. H335 and A2230 are fairly close to each other in burn rate. IMR4895 and IMR4064 are both tubular powders. The granules of 4895 are shorter and drop through a powder measure more smoothly than 4064. Overall though, I have found 4064 to be a more reliable producer of accuracy.
For me, the ball powders tend to have a more pronounced muzzle blast than stick powders.