No, Victor tips or attachments will not fit a Harris torch handle. (caveat, unless it is a Harris V-series Victor-compatible one.)
To see what attachments or tips you could use, check the torch handle model number.
Then go to the Lincoln Electric website (Lincoln bought Harris a bunch of years ago) and look up a catalog or info on what tips/attachments you could use with that torch handle.
Or contact Lincoln (call, email, whatever) and just ask them what items are compatible with your torch handle.
And the tips you pictures are welding type tips. You can use them (carefully!) for heating or soldering or brazing, although they typically have a 'focused' flame tip needed for welding. So-called 'heating tips' (to me at least) are usually the 'rosebud' type tips (multi-flame heating tip).
Do NOT just go willy-nilly replacing O-rings! They must be the proper size AND the proper material to be compatible with both the fuel gas AND the oxygen.