Sklansky hands vs Unknown hands

[high007]

Hey everyone, I was browsing the web to see what kind of info was out their and I came across this:

Sklansky Hold'em Hand Groupings:

Group 1: AA, KK, QQ, JJ, AKs
Group2: TT, AQs, AJs, KQs, AK
Group3: 99, JTs, QJs, KJs, ATs, AQ
Group4: T9s, KQ, 88, QTs, 98s, J9s, AJ, KTs
Group5: 77, 87s, Q9s, T8s, KJ, QJ, JT, 76s, 97s, Axs, 65s
Group6: 66, AT, 55, 86s, KT, QT, 54s, K9s, J8s, 75s
Group7: 44, J9, 64s, T9, 53s, 33, 98, 43s, 22, Kxs, T7s, Q8s
Group8: 87, A9, Q9, 76, 42s, 32s, 96s, 85s, J8, J7s, 65, 54, 74s, K9, T8, 43
The second table here has been floating around and it was part of someones research project their senior year. They did a number of tests that proved that the Sklansky table was good, but needed improvement.

Modified Hold'em Hand Groupings:

Group 1: AA KKQQ JJ AKs
Group 2: TT AQs AJs KQs AK
Group 3: 99 KTs QJs KJs ATs AQ
Group 4: A8s KQ 88 QTs A9s AT AJ JTs
Group 5: 77 Q9s KJ QJ JT A7s A6s A5s A4s A3s A2s J9s T9s K9s KT QT
Group 6: 66 J8s 98s T8s 55 J9 43s 75s T9 33 98 64s 22 K8s K7s K6s K5s K4s K3s K2s Q8s 44 87s 97s
Group 7: 87 53s A9 Q9 76s 42s 32s 96s 85s J8 J7s 65 54 74s K9 T8 76 65s 54s 86s
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Is this second hand group really an improvment from Skalansky hand groups? which hand group would be better to memorize?