I first started out wanting to play bass, but wound up gravitating towards guitar. Even though Bass is similar to guitar in the layout of the strings, the playing technique is for the most part quite differant. I can play both, but when I play bass, I use a lot of guitar technique, IE, drastic string bends, barre chords and a lot of the times I use distortion. Some people seemed somewhat incredulous that I can bend barre chords on a bass, as it requires quite a bit of strength to do so.
If and when you can afford to, try both instruments, but at the same time keep your amp setup more along the lines of guitar amplification. Guitar Amps still utilise tubes, and some of the older ones like the old V series Ampegs and the YBA/YGL series Traynors plus Sound City's are very good with both instruments.
Current Bass amps as well as some from the 70's like the Acoustic 370, and the Sunn Colosium series are usually transistorised, and setup somewhat like a small PA system to produce clean tones.
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