Which gear ratio Metanium reel would better match my 7' 2" Medium Poison Adrena for fishing small jigs, spinnerbaits, worms, senkos, jerk baits, and rattle baits?  Thanks for any and all help!

Either way, both are pretty fast. I was in the same situation when I was shopping the Curado 70. You're in a weird situation because small jigs, worms and senkos often pair well with extra fast ratios but spinnerbaits, jerkbait and rattle baits usually do well with slower reels.

If I were you, I'd go with the HG. I honestly don't think you could go wrong with either. The HG is still 7.4:1. The only difference I think in the HG and XG that might be noticeable is the handle length. If I'm not mistake the XG handle is a 96mm handle?

In my opinion, the xg is definitely too fast for spinner and rattle baits. It'll feel like you're reeling in slow motion to keep them down in the water column, and that gets old fast. 

The HG is a great choice, though still pretty fast, like @thebillsmanmentioned. More than capable for any plastics or jigs you're fishing.

The real advantage of the XG in my estimation is for power (not torque but speed), usually tournament fishermen who want to get as many casts in as possible when flipping cover. Otherwise, a 7 or even 6 gear ratio will more than suffice. 

Ultimately, you'll probably want a slower ratio reel, probably in the 6's for your treble hook/spinner baits.

Blazing fast gear ratios have their place and are admittedly nice, but aren't all purpose and are as much about marketing as practicality.

I agree with the above comments. The XG will be a great fast reel for quick line pickup, an advantage for soft plastics, but will be too fast for moving baits. From time to time I'll tie on a spinnerbait on an XG, (mine's 8.2:1) and I have to really watch my handle rotation, it'll pull it too fast and won't stay down in the water column.

I think the HG will be a "best of both worlds" for you

As stated the XG will be too fast, the HG may work better for what you're trying to do. For moving baits I like the Metanium R, I tend to reel fast, so works great for me.