Can my Wife ski girls/juniors skis?

My wife is a beginner and very small (5'2, and about 105 lbs). Would there be any drawbacks to buying a pair of girls skis instead of womens? The only reason I ask is because the women's skis are so much more expensive and if she can get away with learning on a 140cm or 150 cm junior ski, it would save some money. We have been to a couple different resorts and both times her rentals have been around 143 - 147, so I am just curious if I am missing something other than length. Thanks.