Question, 2 similar domains, best one?

Hello Lads and Lassies.

I have a question and it is late on a Sunday and my head is a bit fried.

I have a Kindle "how to do something" book for sale that I want to promote.

I registered www."to do something".org and am building my site and am about to pull the trigger to promote it, registered it in early March.

It has 4400 searches a month and keyword difficulty of 9% on keyword revealer.

However I just registered www."how to do something".com today.
It has 6600 searches a month and keyword difficulty of 12% on Keyword revealer.

Should I continue with the .org website or switch over to the better .com domain now?

I would think the extra 2200 searches and the .com is probably worth it even though the .com domain is just registered today?

I can probably use all the same social media accounts although they won't be exact matches now.

Anyway, I'm fairly clueless here on this.

I also got the Silver Service keyword report from Keyword Savvy/namhq69 on here.

It is very good.

the www."to do something".org has niche value 46 and top results 39

the www."how to do something".com has niche value 63 and top results 47

Any thoughts?

Thanks.

howtodowsomething.com, whatthefuck.com type of exact match domains not works after Google EMD Update

Read step-by-step process for safeguarding your EMD domain here

Hi Back2form, thanks for the reply.

I didn't explain myself properly in my original post. However your reply was a good reminder, I think, that it doesn't really matter which one I choose.

I will be pretty much doing all white-hat SEO, I will have very good content and I hope that people will share it via social media, so that really it won't make a difference which one I choose?

Am I right there? I think I am, head fried here