I can only speak for 1 of the balls.  I have a Tribal Fire and I am finding, at my current house, that ball is much stronger than advertised.  My pin is located right of the ring finger, cg below the ring and this ball hooks really early.  Although I have used it at another house and it had decent length.  I really like the way this rolls and hits though. 

Based on your comments, I would like to recommend adding a Primal Rage (assuming you want to try Motiv).  Based on your comments, we could be very similar bowlers...only I am the right hand version.  The Primal Rage has proven to be a very versatile ball.  I have the pin up and it goes long and when it makes its turn it is very continuous.   The best part is if/when you run into a condition that requires you to open up the lane a bit, this will do that and still finish.  I have a Byte drilled skid/flip and the motion is the shape is similar to the Primal Rage, but playing a deeper inside line, I would leave or trip weak 5,7's and stuff, where Primal Rage seems to drive through and kick out the corners.  Something I have always battled.

I have since added another Motiv ball to my bag (Ascent Apex).....so pleased with how Motiv rolls for me.  Funny thing is I bowl with a friend who in many cases selects her arsenal based on how it matches her outfits (or smells), so unless there was purple or pink, it was out of the question.   Well she is saying she really wants a Primal Rage...hoping it will roll for her like it rolls for me.   We shall see on that.  Her husband throws an Octane, and he does very well with that ball. 

I have a nephew that uses nothing but Motiv and his recommendation to anyone considering Motiv, to get the Primal Rage....which is how I ended up with that.  I won the Tribal Fire in a contest.  2 completely different looks (the way they are layed out).  But both are very continuous rolling balls!

Back to your original comment...of the 2 Motivs you mentioned, I would then suggest the Tribal, as it has the same cover as the Primal Rage.  I had not seen many Motivs used in my area but they are slowly starting to appear on many of the ball racks.  The pro shop even put a couple on display.

Give Motiv a try and I suspect you'll be pleasantly surprised!!

I have the Rage and Octane. Got the Rage first and liked it. Then got the Octane and did not like it until a cover adjustment and now I love it and use it more than my Rage.  This Octane is now the first ball out of my bag.

I too, can only speak for the Motivs you mentioned, but of the ones you did mention, I would go with the Tribal as well. It's a little difficult to suggest anything though, knowing very little about the shot you bowl on. The Fire is much stronger than the original, and it'd be tough to use it on anything "dry."

I will pretty much echo these comments, except i do not know the comparison to the DV8 mentioned.  I also have a Storm Byte, and the shape is similar to the Primal Rage, hiwever ad Matt states, the Rage has a hit and continuation like no other.  Also as he mentions....the Tribal Fire is much stronger than advertised.  I find i need to find oil for that ball.....like the Rage.   I do have to chase the oil in but this ball lets someone like me, who is more up the back, and lower revs and speed, do that with confidence.  It recovers very well. I dont see sport conditions very often, but it has been great on our house shot.

The Primal Rage is an excellent ball. I've drilled a number of them for customers and I've yet to see anyone who is disappointed with it. It is significantly stronger than the other balls you mentioned though, so if the area of the lane you like to play is dry by any means, it might take a surface adjustment to make that fit where you want to play on the lane.

The Ruckus and the Primal Rage may be close in overall strength, but that's pretty much where the similarities end. The Rage will be a bit longer, stronger in the backend, and honestly, I'd be willing to bet money I don't have that it hits and carries better than any other brand. You'll find that with all Motiv stuff. The hit, carry, and continuation is unmatched.

Good luck and feel free to shoot any questions my way.