Greetings nong1965!
either choice is good. They are both identical underneath. It becomse a matter of style preference. I have the XRB shuttle, but sometimes I think I would have liked the Lama more. It's too late now.
In any case they wont disappoint. Hirobo has an excellent rep for quality and stability. One thing to consider though is if any of your local hobby shop carries parts. It helps get back in the air faster

and price differnece is not always that far off.
Lastly, there are some but not many upgrade/mods for this heli. It doesn't really need it but if you like to tinker or personalize, this wont be the best choice unless it is like external cosmetic to stock parts.
Also one to consider that is a recent or soon to be added member of this family of little heli's is Hirobos SRB Quark. Check out the following Vids:
http://model.hirobo.co.jp/03-img/0302-SRB/P1010408.wmv
http://model.hirobo.co.jp/03-img/0302-SRB/P1010405.wmv
There is more info here:
http://model.hirobo.co.jp/products/0302-901/index.htm
Good luck.
Ps. You may also want to look at the Blade CX2...it is also very popular...I have seen them fly, but I have never flown it myself.