Arcane vs Fire

I've checked the link I give you all and it doesn't work today for me (lol), so try this:
http://www.wow-europe.com/en/info/basics/talents/mage/talents.html?2550050300230150333125050023000000000000000000030000000000000000000

This was my old arcane build. I liked it, cos I've natural inclination to arcane magic :p

I've tried the following new talent tree yesterday:
http://www.wow-europe.com/en/info/basics/talents/mage/talents.html?2300050000000000000000051523201030333105312500030000000000000000000

The differences I've noticed:
With the new build it's much easier to achieve high damage rate. However, I've to worry seriously about threat. During a boss fight (Prince) It was necessary to use invisibility and at the end I had to slow down a little bit.

More crits come with the fire talent, however with arcane talent I was able to reach much higher solo crits (almost double!)

Obviously I have lower dmg with arcane missiles. Now I've only 400-500 per tick. With the arcane talent I had 800-1600 per tick, average was 1200.

With the arcane talent I was able to burst the highest damage in the raid for 30-45 seconds, but then I was out of mana :)

If using fireballs with arcane talents I'm never out of mana, but obviously I've less damage as well.

With fire talent it's impossible to consume all my mana within 2 minutes. With arcane it was easy :)

However, slower mana regen rates meant difficulty for me, cos I needed more mana potions than with arcane talent. During a boss fight I used only 1-2, yesterday I used 5 during a fight and all mana gems.

I need to get accustomed to the new talent but it was good to see, that without effort I was able to have the first/second position on the damage list - which rarely occured before.

Some personal impressions about the talents:
I noticed that the arcane talent needed some finer, more subtle approach when handling situation. While fire build meant more brutal approach. :p