TL260 is 5 way
L890 4 way
A review of TL260 is found here:
http://www.areadvd.com/hardware/2007/jbl_tl260.shtml
In the review TL260 was found to be exceptional except driver timing (many drivers, difficult to engineer the timing)
With L890 a better timing would be expected but cabibet resonances may be a problem compared to TL260.