Here to eat my words a little.
Gave the Tile another whirl today. Astra SP blade, Henri & Victoria Cognac and Cuban Cigars soap (a sampler I've had for a few weeks), and my trusty Old Grafton Century T3 boar brush.
The Tile started a little rough and tuggy again, but I adjusted my angle, and it actually became more comfortable. I hydrated my lather a little more, and then the Tile actually became pretty comfortable to use. Now, I'm a cold water shaver, and I wondered what might happen if I rinsed and lubricated the razor using warm water, so I gave that a go, and the Tile
really improved. The warm water was what it needed to achieve a decent level of lubrication and move over my face smoothly and without discomfort. I was really surprised, having had so much drag in the previous shave.
It's much more comfortable and efficient than the Henson, and the weight of the stainless steel head and handle way more to my preference, but it is still a relatively mild shave. Better than the Henson AL13+ for certain, but I still had to go over the trouble spots a few times. Warm water and a very well hydrated, slick lather is also needed for it, but give it those things, and the Tile is really not bad at all.
I'll give it another go on the bonce using warm water and something really slick, and see how it fares. So I will be using it more. Funny how different razors, made of different materials, require such different, subtle variations...