Out of the 2, Frommers for sure. I evn have the 2001 Paris book for it, and it came in very handy when i was there. Overall though, I must say that Lonely Planet has the best all around info, and a wide array of destinations. It caters I think to both backpackers and upscale travellers. For "western" countries I think Frommer's is great, but for countries like Iran, Peru or Bhutan- Lonely Planet is you best bet.