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100% pro, the graphics card isn't amazing on the pro, but as you have said, if you are not doing any heavy lifting that you'd be able to get more out of your money in a long run.
Have you tried their refurbished nstore, sometimes there are bargains to be had. Or get someone who is a university student or work in Higher Ed, youd get 10% discount if they are there with you when you buy.
Or get them to log onto Unidays for you if you are buying online, which you'd have to if you are going for a custom specs.
13inch.
Air with the Intel UHD Graphics 617
Pro with the Intel Iris Plus Graphics 655
Think I'll just stump up a few 100£ for the 16GB RAM pro and see if I get get another 7 years out of a Pro.