Hard to tell without the upper surface colour as contrast, but it looks close. I think I'd maybe lighten it just a tad. It's surprising how dark Neutral Gray was, when 'fresh', but it did weather quickly, and often looked a lot lighter, maybe a shade or two darker than Medium Sea Grey.
I've only once used 'proper' Neutral Gray, from Xtracolor, who are normally 'spot on' for accurate colours, but even in 1/32nd scale, on a P-47, I thought it looked too dark for a 'used' aircraft. Ever since, I've just mixed my own, until it looked right!
My current P-47 is an example, and this is possibly darker than I usually mix it.