Changed my hearing aids

Hi all

i am a vehicle technician and work in a noisy environment and have used Phonak hearing aids for the last 5 years. On Monday I got replacements at my local hospital which are the Phonak Nathos Auto sp and I want my old ones back! Really struggling with them so will be going back to the hospital to get them adjusted and try again but what I’m wondering is has anyone brought the Phonak marvel? Or tried oticon and other brands. The sky Q seems popular but does going private help? Just want natural as possible sound. Also can we chose what colour aid we have from the hospital? Thanks Joe