FWIW, I have it's predecessor, the WD1001 (WD1 power unit + WMP 65W iron). Overall, I do like it, particularly the simplicity of the UI (the 3 "radio" buttons for presets are quite nice), and think it does have a slight edge over the Hakko in this regard. Connectivity too, as Weller offers more devices for it than Hakko does for the FX-951. Please note tips made in Bosnia and Mexico have had a high defect rate (~30 - 33% IME), while those produced in the US, Germany, and Japan have been fine.
Between the two, that's a tough call, but I'd probably opt for the Hakko due to the easier to change tips (nothing to unscrew*), and tip quality for Hakko has been stable for years and years. Assuming you won't need any more thermal capacity than even the larger FM2027 iron can deliver (best to have both irons IMHO, as even for SMD, you can run into situations that the micro iron can't handle). The larger iron has suitable tips for SMD as well (Weller as well).
If you find yourself in situations where you need more power, I'd have to give the nod to Weller (80W).
Tip selection for the FM2032 is all of 6 offerings, while the WP65 has 37 tips available (XNT series & their COO = Germany). Not sure what you're doing, so this may be a critical deciding factor in your case.
Manuals: Regarding spares: Generally speaking, Weller spares are available for a good while, including heating elements (Hakko too for that matter). Unfortunately in the case of Weller's micro irons however, they do not have replaceable parts. So if/when it dies, you have to replace the entire iron (the larger irons offer still offer replaceable heating elements).
* Purchasing additional tip retainers significantly speeds tip swaps, as you can select the tips you need, load them up, then only have to screw/unscrew as needed. Takes me ~10s to do a swap on my WSP80. Regarding the Bosnia defect rate (none of the LT series are made in Mexico), there are 3rd party solutions such as Plato/Techspray to help mitigate that issue (Weller appears they may be addressing this issue, but there's still a lot of old stock in the supply chain right now IME).
Tip changes on my WMP are more of a PITA (special socket wrench & it gets uncomfortably hot
![Rant :rant:](https://www.eevblog.com/forum/Smileys/default/rant.gif.pagespeed.ce.koOB_HE-VX.gif)
). They definitely improved tip changes with the WP65's design
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif.pagespeed.ce._JElyJQqdB.gif)
, so I'll end up swapping for it at some point.
![Evil >:D](https://www.eevblog.com/forum/Smileys/default/xevil.gif.pagespeed.ic.tdrs7Uj5gu.png)