One of the major differences between seed grown plants and cuttings are the development of their root system.

From seed, roots form generally from the top of the soil down to the bottom of the pot. But from cuttings, since the end of the cutting is under the soil, the roots tend to grow from wherever that cut end is sitting in the pot. If you’ve shoved your cuttings all the way down into their pots so that their cut ends are touching the bottom, you will likely get roots growing UPWARD rather than downward which can cause problems for the plants long term health. But, if you position them more towards the middle, or are using an aeroponic system to mist their new roots directly, there should be minimal differences between plants from cuttings and those grown from seed.

Pelargoniums can live for a long time compared to some other common house plants. I wouldn’t be concerned about their vigor. Any issues with flowering are more likely related to light/season/temp, water availability, or nutrient availability.