MONO cartridges


I bought a few Mono reissues and now I think about a proper cartridge for them.
But the information varies a lot, some write, for those reissues I don't need a mono cart., there would be no difference to a stereo cartridge, or the differences are not worth the price difference.
Next, are the modern mono cartridges only stripped down Stereo cartridges?
Half winding, half output?
How about the difference from the needle?
Are the "old" Monos the way to go? SPU?
I have a Lyra Helikon stereo running at the moment, that one is available as a Mono cartridge, or others too.... some experiences?
Thanks
syntax
yes, i've 'tried' several, but never found it any more effective than a mono switch to enhance the fidelity. the capatibility debate has never been a concern for me. the cartridges I've 'had' were purchased because i had a spare turntable for experimentation, but were never a seminal purchase. playing a vintage mono lp. or a new re-issue on a 'stereo' is nothing for most to worry about.
Thanks for your response Hevac.
I will try mine at 940 ohms which is the highest loading I have for the pre without ordering new resistor plugs.
Did you try yours at a higher loading before making final load decision? They state the higher the loading, the more open the result.
I have used a Lyra Helikon mono for several years. The loading issue is a matter of personal taste. I usually start on 47k Ohm and work my way down until I hear no improvement. The nominal impedance for most moving coils is around 100 Ohm but this may be too low for the Helikon
In comparing a mono to stereo cartridge on the same record and by switching arms in the turntable arm mount, I can definitely tell you that the groove noise is virtually gone and the image depth improves greatly. If you have more than a few hundred mono lps, and can interchange tonearms easily, a dedicated mono cartridge is the way to go.
i've read all your answers and I would like to say 'Thank you' to all of you.
I went a step ahead.
May I ask, did someone comparisons among mono cartridges? Dorian to Helikon or Titan for example?Or with a SPU?
I have compared EMT TMD25 with Benz Glider mono version on some older mono records. Glider was incorporated into the EMT TMD headshell. The results were, I prefer the TMD25. My interpretation is that the difference lies in the stylus dimensions, the TMD25 being 1mil (25mM) spherical, and the Glider, I assume, having the same stylus, as their stereo version. However, the difference may well be elsewhere. Sorry, I haven't tried playing newer mono records. Maybe, the Glider will shine with them.