ADL5519 envelope bandwidth

I'm comparing two parts, the AD8302 and the ADL5519.  The AD8302 datasheet discusses the envelope bandwidth quite a bit, and specifies it at 30MHz, while the ADL5519 only has a spec of 10MHz.  Is there a reason the ADL5519 has a lower envelope bandwidth than the AD8302.  Is there any way to increase this?  Does ADI have any similar parts with a higher envelope bandwidth?