Ditto to everything Beck said.
Some things you might expect from the 150 would include higher noise floor, less headroom before saturation...I'd highly recommend biasing but the problem is Tascam didn't specify VU overbias...it is by voltage output of the bias amp and spec'ed around 407. Based on advisement by folks in analog support at Tascam in CA, I was alerted that the bias requirement of the LPR35 I was using was significantly different than 407, so I did the best I could to narrow down the bias amp output level for LPR35 using the LF modulation method...it was tough doing this on the 388 format, but I came to a comfortable conclusion. I think I documented that toward the end of my "Tascam 388 Story..." thread. Anyway, to do it right, you'd need to do the same kind of thing to determine the proper bias level for the 150. But you aren't going to hurt anything by just poppin' it on there and trying it out.
In the vein of Beck's closing statement, have fun. Report back your impressions.
Your ability to be a complete ignoramous.