Yes, they are additive together if they are next to each other.
If you are able to get them (I am), you can still use 130v rough-service 100w bulbs. In a 120v circuit they will be equivalent to 75w in brightness more or less. Examine your socket to see if it has markings that indicate what it can handle. I just grabbed a table lamp that I've only ever used 60w and lower in.. looked at the molding on the socket. It says 250v 660w. That's a lot. The wire gauge going into it is 18, so it can handle 100w no problem. This one would be fine because there's no enclosure or shade over the bulb, it's open to the air and the base is pointing up not down. Be careful with antique cloth wrapped wiring or enclosed fixtures.
The edisons are dimmer for sure (but nicer looking), but you can use rough-service too. A 100w 130v would generate about 76 watts of heat on a 120v circuit, vs 90 that it would on a 130v circuit.
I think you can get away with a lot. A19 is just the shape of common regular bulbs. The base itself of the regular A19 bulb is E26. I'm looking at a PS25 bulb here on a website that is an E26 base and is 300w. It's 3900 lumens. I could absolutely use that on my table lamp though I wouldn't want to be looking at it directly.