There are differences between the generators and also between the generations of the generators. Also different phrases in the prompting can have an effect on the variety.

For DALL-E-3 the 'motherboard coin' look comes up a lot. But I remember using midjourney where a wide variety of logos would come up (and again variety between midjourney 4, 5, 5.1, 5.2 etc).

I think you just have to experiment...