more pics
http://www.notifight.com/artman2/uploads/2/Weigh_Lopez_vs_Penalosa2.JPG
http://www.notifight.com/artman2/uploads/2/Weigh_Lopez_vs_Penalosa3.JPG
http://www.notifight.com/artman2/uploads/2/Weigh_Lopez_vs_Penalosa.JPG
They are nowhere near the same height.
Juanma is 5'7" Donaire is 5'6 1/2". I don't think Donaire gets up to 130. If this fight is made it should be at 122.
http://i40.tinypic.com/2qdbxvk.jpg
Not too big of a size difference. Just different body types. Juanma's arms and shoulders are more ripped because he's a slugger. Height difference is negated because Juanma doesn't really fight tall and they have the same reach.