Recommendations needed on 10mm or 14mm

[Juel]

Hello everyone.
I'm looking to get myself a wide-angle prime lens. It will primarily be used for nightscape/wide-angle astro and landscape photos.
My camera is a canon 700D (ie. a aps-c sensor).
I had almost settled on the Samyang 14mm f/2.8. However, would the Samyang 10mm f/2.8 perhaps serve me better, considering the crop sensor? On my canon the 14mm=21mm and the 10mm=15mm. So I was wondering what would suit me best.
Any comments and thoughts would be much appreciated, as I don't really have the budget to buy them both
Thank you.

 

[Rick50]

I recommend the 10mm. I have one for crop and a 16mm for full frame. Both are nice and wide.

 

[Juel]

Thank you