Regarding the Tama Warlord snare drums... Yeah I can distinguish the sound differences. The Spartan drum has that expected metal drum character and sound. The Praetorian drum has the same character as the Spartan, though it sounds bigger and louder. The Masai drum is slightly warmer than the previous two metal snares, due to its wood shell. Though I think it's tuned up high, that's why there's so much crack and crispness on its sound. The Valkyrie drum has more crack and less sustain than the Masai drum.
I guess we just need to listen harder and more carefully in order to hear the little nuances among the four drums. And the sound differences would probably be more recognize-able if we hear the actual drum played in front of us, instead of listening to mp3 samples. Recorded sounds from studios can be deceiving sometimes.
Jeva, regarding your three questions...
1. Yeah, I've experienced that pressure thing in my ears during air travel. But I haven't experienced anything that extreme or severe yet.
2. I do, especially after doing gigs with excessively loud volumes. This happened a lot before, until I began using in-ear monitoring system on gigs, which doubles as ear protection.
3. Like what I said, I use in-ear monitoring system, which doubles as ear protection. Currently, I'm using M-Audio IE-20 XP isolation earphones. I also think it's important to be aware of our volume limitations. Whenever I play drums, I don't really bash on them for volume. Besides, playing lightly sounds and feels much better.
I also give my ears its time to rest. For example, after a long gig, I rest my ears by going somewhere more quiet, not listening to my car stereo or mp3 player, or simply avoid loud sounds or noises... Things like that, so that my hearing can have its break.
I hope your case isn't so severe, Jeva. Our ears are very important assets, as musicians. Let's take great care of them, especially while we're still young. So that we can continue enjoying, playing and listening to music for many years to come.