Dom Psionic Powers
Uh... you can't actually get those powers until levels 10 (Mental Blast) and 28 (Subdue), so I would suspect that the numbers you're getting are calculated incorrectly. Are you using the "real numbers" dropdown in the power selection screen? If so, move the slider up to level 28 and then see what the powers damage and such is.
Also, Mental Blast for Dominator should have a Recharge of 4 seconds (going off of the stats on the Red Tomax site), so you're getting one incorrect number no matter what.
Furthermore, Subdue carries an Immobilize component, so that's at least one difference right there. I agree with Kierthos that the numbers are probably off, though, since these are powers you couldn't have at that level.
Assuming that you are making this comparison as part of a decision-making process, try setting a higher level and comparing them to see which you prefer to have. Or make use of Mids' Hero Designer.

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I am at Character Creation. Choose your secondary Power Set Screen. Psionic Assault
Mental Blast as used by level 28 Dominator
Average Damage:59.14
Damage Per Activation Time:35.41
Damage Per Cast Cycle:6.12
Activation Time:1.67s
Recharge Time:8.00s
Endurance Cost:8.53
Accuracy:1.00X
Available Level:10
Subdue as used by level 28 Dominator
Average Damage:59.14
Damage Per Activation Time:35.41
Damage Per Cast Cycle:6.12
Activation Time:1.67s
Recharge Time:8.00s
Endurance Cost:8.53
Accuracy:1.00X
Available Level:28
Hrm. It's possible that the information is bugged.
I'm not at home so I can't check (alas, stuck at work for the next six hours), but the Red Tomax site (http://www.redtomax.com/data/powers/...sionic_Assault) says that at level 28, Mental Blast should be 24.67 Psionic damage on a 4 second recharge, and Subdue should be 40.46 damage on a 8 second recharge.
I can't tell you why the numbers are off on the detailed info. *shrug*
i suspect the descriptions are different partially because the powers have been changed several times since the original descriptive adjectives (high/moderate/fast/moderate) were assigned. Especially since the text was copied over from when they were in other sets with other values and then modified for Doms.
The high, moderate, extreme, long, etcetera adjectives are partially a hold over from when those terms were the only information available to players regarding power capabilities and were only supposed to be for comparisons within an AT and within the primary/secondary set categories of the AT.
Even then they weren't really consistent, and i think the original adjectives may have only been accurate before the original CoH open beta. Or something like that.
Anyway, the point is that the descriptive adjectives for a power generally don't get revised when the power is ported to a new set or archetype and/or changed. At some point i hope a member of the development team is assigned to update the adjectives to conform to some sort of standard scale and check to make sure they accurately reflect the power's actual stats.
Dr. Todt's theme.
i make stuff...
They have different descriptions because the description has never been very accurate (Mental Blast is High while Subdue is Moderate, but Subdue used to do more damage), and because the Dominators (and Psi Assault especially) recently got revamped.
The two powers are extremely similar now, despite what their description says.
http://www.fimfiction.net/story/36641/My-Little-Exalt
Ok, thanks. I will be more careful with the powers I choose.
I was looking at Dominator - Psionic Assault Powers: Mental Blast and Subdue.
These numbers are from lvl 4. My actual level.
Mental Blast Description:
Damage: High Recharge: Fast
Average Damage:19.91
Damage Per Activation Time: 11.92
Damage Per Cast Cycle:2.06
Activation Time:1.67s
Recharge Time:8.00s
Endurance Cost:8.5
Subdue Description:
Damage Moderate Recharge: Moderate
verage Damage:19.91
Damage Per Activation Time: 11.92
Damage Per Cast Cycle:2.06
Activation Time:1.67s
Recharge Time:8.00s
Endurance Cost:8.5
Why they have different descriptions if they have the same numbers?