Sell the BV! The Fuchsia Neo Denim Speedy is never to be repeated a BV (or any very similar style) can be purchased anytime!
But as someone's already mentioned, what do you/would you use mostly? If you never use the Denim Speedy and always the BV then there is no point selling the BV....
It is hard to determine whuich you should let go because they are 2 VERY different bags. I like them both. I would keep which ever one you LOVE the most.