I like Inbox, and I use it...but have you noticed that, stunningly, you can search for things in Inbox and get zero results and then take that same search into _gmail_ and get results??
(Unfortunately, no, I don't have an example I can demonstrate extemporaneously)
Inbox doesn't search hangouts conversations, which is a huge annoyance for me. You can load gmail and search and get those results, so it's annoying that you can't get it in Inbox. Other than that, I really prefer Inbox.
Search for emails should be the same between the 2. But I believe Gmail will search other things (like Hangouts chats and maybe other products), while Inbox's search just does email.
Maybe the search is less different than I think it is.
But there are other things... like, am I wrong, or can you still not Mark As Unread in Inbox? Last I checked, you couldn't mark as unread, and if you tried to find out how you'd run into zealots who tell you that your use-case is wrong and that you're using Inbox wrong. So, okay, say I accept that premise; say I accept that there are some things that are just 'the Inbox way' and others are 'the gmail way'.
With the click of a button, Gmail lets you save all attachments to Google Drive or download all attachments as a zip--why in the world wouldn't they include that with Inbox?
Gmail lets you click an icon in the search bar to reveal advanced search options; if you need to search for something that has an attachment in Inbox you need to either A) google how to do it or B) try to remember "now was it has:attachment? or has-attachment:true? has-attachment:yes?". Is it really so distracting having that little down-arrow icon in the search bar?
Also, testing just now I found that the pagination in gmail would let me browse through hundreds of search results going back to 2012 whereas the Inbox endless-page stopped loading additional results by the time I got to email from 2014.
This happens to me _everytime_. So frustrating. Is it possible that inbox only searches the literal "inbox" whereas Gmail searches your entire mailbox?
I generally like Inbox as well, feels faster than gmail. Though i've recently gone back to using a local client instead of the web. It's a bit of a change, but just feels simpler to use.
The Inbox webapp always worked incredibly slowly for me on Firefox but fast on Chrome. Now I only use the Android app (and only when I need to use the snooze or Trips features) for everything else I use Gmail webapp on Firefox
Search has been faster than it used to be. I've noticed this in Mail on iOS as well. I use airmail, which i don't think it downloads all emails locally.