Hey Rock,
For me, the Delta is stronger and can handle more oil. As Ramtart stated in his mini, Ramtart and I both had the Delta hooking thru and recovering strongly in pretty heavy oil so long as there was some friction on the back. My Reactive is drilled a little more for length but still cannot eat thru the same concentration of oil from what I see the Delta can handle. So long as there's some free hook, look out, the Delta is pretty strong.
Excaliber and I also pulled out our Delta's in Cincy and they just plain rolled out but his Reactive was useable to a point. Still to dry for it but it didn't grab and roll out like the Delta did. The lanes were pretty dry thru the heads and mids. Hope this helps bud.....
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Rick Leong - Ten Pins Pro Shop
Track Intl. - Amateur/Pro Shop Staff
Vise Inserts Staff
www.Trackbowling.com*El Presidente of the Track Revolution