Normally I'd say it was too close for sibs, but obviously you won'y need to call them both at the same time.
My son that was stillborn was named Riley, and I decided on Milo for my next boy without realizing until weeks later that Riley and Milo are kind of close. The middle sounds and letters are exactly the same but I didn't notice when I first picked it out. I'm not changing it though.
It's kind of a personal choice for you to make. If you like the name than go for it, but if it is going to make you feel sad whenever you say it then you might want to change it.