Is there a difference if I separate the same workflow into two?

Hello,

I have an optimized workflow question.

Example:
Trigger when a new image to Dropbox, there are a couple of actions in between, then finally creating a WordPress post for each image.

If multiple users upload images to Dropbox bucket A simultaneously, let’s say they need to upload 1000+ (possibly more) images at the same time. This would create 1000 tasks.

If I duplicate the workflow and have users upload images to Bucket B, dividing the workload.

One workflow can handle 1000 images in a minute, while two workflows can handle 500 images each separately, simultaneously.

#1 If I want to use only one workflow for this project, would it make a difference?

#2 Is there any suggestion to optimize the process of creating 1000 posts at a time?

I want to avoid any errors.

Thanks