Purely from my own experience, I think the best Deckard pistol replica on the market in a price/quality comparison is the metal Sidkit 'World-Con'. Accurate enough, very well cast and all metal (there have also been a few high-quality plastic Sid’s from those same molds, in bright pink). The Tomenosuke Pro-Retail / 2049 kit version is next because it's affordable, very accurate and great fun to build but it has a plastic frame to comply with Japanese firearms laws. The fully-Built Tomenosuke comes a close third because it's just as good but much more expensive. I place the built Coyle fourth because it's all metal but also very expensive and the Coyle kit fifth because it's expensive and a LOT of work to complete to a high standard. The Offworld M2019 brings up the rear because it is mostly plastic and not so accurate in detail or proportion.
Although not in the same league as those high-end functional collectibles the Tomenosuke rubber stunt of a few years ago, and the recent Tomenosuke plastic stunt are both fine pieces of casting and still very desirable. There is also the Takagi but I have no experience of this version although I understand it's a good gun, very much like the Tomen', at a similar price, with the Japanese-mandated plastic core components.
My opinions are based on the fact that, in the past five years, no less than fourteen Blade Runner pistols have passed through my ownership;
- 4x metal 'World-Con' Sidkits. 2 completed by me and 2 sold unbuilt
- 2x pre-built plastic Sidkits
- 2x Tomenosuke 2049 kits, one built by me & one sold
- 1x pre-built Tomenosuke HCG edition, modified by me
- 1x Tomenosuke rubber stunt edition
- 1x Off-World M2019
- plus 1x solid resin 'stunt' casting, painted and finished by me, and 2x Fullcock water pistols...
- I also have a friend with a pre-built Coyle C&S and an as-yet unbuilt Coyle kit. Both of which I have examined very closely.