Replacement SSD for Latitude E7440

Hi,

I'm looking to replace the SSD in my E7440 laptop. Laptop was quite high spec and was shipped with an SSD - I think this was a Samsung PM 851 256 GB mSATA SSD, which was in the hard drive bay and mounted in one of those plastic caddies (interposer).

Basically, I am looking to replace this hard drive. There will be no data recovery, just a fresh install of an OS (probably linux). What drives are compatible?

So far my options seem to be:
(i) Crucial MX500 250GB SATA 2.5-inch 7mm (with 9.5mm adapter) Internal SSD (http://uk.crucial.com/ProductDisplay?urlRequestType=Base&catalogId=10153&categoryId=&productId=2427501&urlLangId=-1&langId=-1&top_category=&parent_category_rn=&storeId=10153)

(ii) Samsung 860 EVO mSATA (https://www.mrmemory.co.uk/ssd-upgrades/dell/latitude/e7440#!samsung-860-evo-msata-ssd)

Are both of these options compatible. Any advantages or disadvanges about obtaining either? Here is a picture of the connector and the caddy/interface board. Can I get rid of this board now?

Thanks in advance.