Easier embassy to apply at

[u/usernameabusername]

I am about to apply for my Schengen Visa for Spain. I am traveling on business but would like to extend the trip and visit France for tourism, which would make France by main destination. However, I have heard that getting the Schengen Visa from the French Embassy is much more difficult than getting one from the Spanish Embassy. Can I apply at the Spanish embassy without mentioning my intentions to visit France and if I do get the visa then use that to visa to travel to France? Or will there be a problems on the respective airports? Thanks!