Nebulizer Cups for inhaling Tobramycin

Good Day All,
I have been using the Monaghan AeroEclipse XL Breath Actuated Nebulizer Cups with my Ombra nebulizer for 7% Saline. I have just started Tobramycin and have been using these cups as well for it.

I was suggested to switch to Pari LC Plus nebulizer cup. Not sure why.
Can I ask what Brand others are using or have used with Tobramycin please?

thank you,

Patty