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They are close here are the dimensions on each Product Name
CZ P-07 – 9mm Barrel Length
3.75 in
Weight
27.7 oz
Overall Length
7.2 in
Height
5.3 in
Width
1.46
Product Name
CZ P-10 C 9mm Barrel Length
4.02 in
Height
5.2 in
Width
1.26 in
Weight
26 oz
Overall Length
7.3 in

I suggest looking around for a store or range that has them in stock so your wife can handle them and see which "feel" best to her. They are close here are the dimensions on each Product Name CZ P-07 – 9mm Barrel Length 3.75 in Weight 27.7 oz Overall Length 7.2 in Height 5.3 in Width 1.46 Product Name CZ P-10 C 9mm Barrel Length 4.02 in Height 5.2 in Width 1.26 in Weight 26 oz Overall Length 7.3 in

Jason, the P-10 is ever so slightly larger but lighter and more balanced due to the slightly longer barrel and would warrant the nod for the carry choice for your wife. Just one of those cases where smaller is not lighter and more balanced.