If your interest is in enterprise wireless, CWSP is undoubtedly your cert of choice. OSWP focuses on cracking WEP/WPA-PSK, rainbow table generation, GPS mapping, client attacks (karmetasploit), etc. This is all obviously good information to know if you manage wireless networks, but the CWSP takes you through the entire process of planning, designing, implementing, monitoring, etc. I took the exam a version back, but I remember it being very heavy on all the different EAP types.

Edit: I did the OSWP about a month ago and have been meaning to post a review on my blog. I'll try to get that up sometime this week.

Well said, if you do not want to drift off from the ethical hacking side OSWP is a good choice.