Which one to choose: Ace3DS X, R4i B9S or R4i Gold 3DS RTS?

This week, a new flashcard is released on the market, named Ace3ds X, it comes from AE3DS team. And last month, R4i-sdhc team also released a new card R4i B9S.
Before them released, we all know the r4 card which is compatible with NTRboot is R4i Gold 3DS RTS. What’s the difference among these three cards? And which one is worth to buy? Please view the below comparison.

three card comparison
Ace3DS X
Ace3DS X has been pre-flashed NTRBOOT and supports installing boot9strap on all 3DS consoles models & versions. There have a small button on the side of the card for switching DS mode and NTRboot Modes. You can play the DS game and 3DS
game direct switching, without remove NTRBoot.

R4i B9S
R4i-B9S is a compatible DS / DSi flashcart that is also pre-flashed ntrboot. It support 3ds games. If you want to play DS game, you need to install a B9S flasher to switch.

R4i Gold 3DS RTS
R4i Gold 3DS RTS can’t support 3DS game directly, you need to install boot9strap. After this flasher installed sucessfully, if you want to play DS game again, you need to remove NTRBoot, the process is very complicated.

comparison

Ace3ds X allows direct ds gaming and ntrboot hacking; R4i B9S is compatible with NTRboothax and can be switched back to NDS flahcard; R4i Gold 3DS RTS support boot9strap installing.

If you want to buy a NTRboot card, Ace3ds X is a good choice, it’s easy to use and switch DS mode and NTRboot mode.