First, it's not really a change of heart. The two programs aren't the same. Amazon Select is open to anyone who signs up. The perks? You can list a book for free for up to 5 days in a given time period. People who belong to the "Prime" program (it's fee-based) can borrow your books, and when they do, you get paid. On the flip side, you can't sell your book anywhere but Amazon—not even through your website—for 90 days. If your books are for sale elsewhere, you have to remove them.
The Nook First program also requires exclusivity, but for 30 days, not 90. It's not open to anyone. You have to ask to be a part of the program, and participation is limited, so you're not in "competition" with countless other books. You get an assigned 30 day period. Also, it's for books that have never been published elsewhere. (Hence the name "Nook First")
Since SAVING SCOTT is a new book, I asked about Nook First. What I discovered, and the tipping point for me, was that Barnes & Noble actively promotes your book during that 30 day period. Among other things, their current agreement says they will place your book on their storefront, and include your book in email campaigns. Their website has a special "Nook First" page where your work will be on display, and not with dozens and dozens of others. And, a well-known successful author's experiences with both Kindle Select and Nook First helped me make my decision. This is what she had to say:
I've done both the Nook First and Kindle Select programs. My take…Nook First was fabulous! BN really delivered as far as pushing my title and giving it great visibility. I more than doubled my BN income that month. I did get a few grumbles from the Kindle and iTunes folks who had to wait, but most were fairly okay with waiting 30 days. And they did have the option of downloading the free Nook app and reading the book on another device - which I know several people did. This is a program I would definitely do again in the future.
