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@pepede: Please could you compare battery life and bottom enclosure temperature in iStatPro?
 
I guess that battery life is a bit longer but i had not done any special tests
 
When system started and i opened safari it was showing approximately 5 hours.
 
how come the memory stuff is a lot better on ML?

In Activity Monitor seems that memory management is more agressive, so I believe it could be better, but we will see. I did not test a long time Safari web browsing with many tabs which is a significant problem in Lion.

The most significant improvement is a Safari 5.2 - faster than 5.1.5 and there is no need to use additional search bar. But I hope that Lion will get also a new Safari as an update.

Updates are now through AppStore Updates which is funny because in Lion there is a place for it, but not used in the same way like in ML. Do not expect much.

I did not test more features, but it seems that ML release is mainly because Apple must to adopt OS icons to new products with Retina display.

Anyway forget about benchmarks I do not recommend to use ML DP2 as a standard day to day OS. Wait for a ML final release. Still there are visible issues: (graphic artifacts) during boot and desktop use, animations are not smooth. Currently Lion seems much better choice even if not perfect.

P.S. Tested on MBP 4.1 Early 2008
 
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I'm pretty sure that my MacBook Pro's Geekbench score is higher on Mountain Lion than Lion as well. Its current score is 6709 and I don't think it was ever over 6600 before.
 
Just got 6416 on a maxout MBA 2011 (64 bit), running the latest build of 10.8
 
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I'm getting about 160 more points on Mountain Lion in GeekBench as well, 9987. In fact, it might even be more since I'm comparing to a machine with more RAM (same spec otherwise)
 
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