That's a better CPU for sure. For me, it's very difficult to give you a clear opinion as I buy my Chromebooks from the USA, and therefore get much more for my money. For $350, I got a HP Chromebook x360 with an i5 and 8GB RAM. At the moment Chromebooks are in short supply and therefore the prices are inflated. If you can, give it a few months. Just PM me if you have any quesitons.
Do you think this for £340 is decent? https://uk-store.acer.com/acer-chromebook-514-cb514-1ht-silver-1
It's that dual core CPU that kills it for me. Fine for a machine costing £150, but I'd expect a minimum of the quad core N4200 for this £. I had an Acer Chromebook 15 with a similar screen and that aspect was top notch.
Prices on models at this level should plummet soon when the Lenovo Flex 5 makes it over here.
The n3350 CPU is dual core, I suppose if your spending this much then a quad core might be better. 14" IPS full hd touchscreen is more on the money though. If all you want to do is stream video, browse the net and use office apps then this would do that adequately.