I've used the BLX 6.1 95 16x18 and 18x20 for awhile after switching from my IG Prestige MP. There's not a lot of similarity between the two. Different head shapes, weight, string pattern, etc. the 6.1 felt a little more hollow than the Prestige, but the Prestige felt whippier and more solid on impact. I actually prefer the 16x18 on volleys, but the Prestige on serves. The Pure Strike Tour would be similar to the 6.1 18x20 since it is heavier than the Prestige but lighter than the 6.1. I've tried the Graph. Speed Pro 18x20 but I haven't come to terms with it. Feels to head heavy and I had a very hard time serving with it. The most arm friendly one of the bunch was the Pure Strike Tour. My elbow pain (from the 6.1s and the Prestige) actually went down. Oddly therapeutic racquet.