You're welcome. I generally only make calls over Wi-Fi calling or VoLTE (typically only using my headphones), but between the two it would be difficult to determine any sort of difference on call quality from using the handset up to your ear. However, if you use speakerphone often, I would probably lean towards the iPhone 7/7+ due to the stereo speakers.
If your use is mostly basic such as phone, text, email, then definitely go iPhone, I feel like it's a better experience for that usage. For instance on iOS you can save voicemails as shown here:
https://support.apple.com/en-us/HT205012
But, on the Pixel I can't find a way to save any voicemails, although it wouldn't surprise me if this was added at a later time. Also on Verizon the iPhone can have 40 voicemails for free, whereas the Pixel can only have 20 with their basic voicemail or 40 with their $2.99/month premium voicemail. Here's a link for a comparison chart:
https://www.verizonwireless.com/support/voice-mail-comparison/
Both are nice phones but each excel in different areas and each have their own limitations.