I usually would not give options. I didn't want to compete with myself and didn't want to further confuse the customer from what the competitor(s) offered. Always quoted what I thought was best for their application.
The "Heinrich" is most likely a Jungheinrich which as a European company would only offer 48 volt. My experience has been that their parts pricing is way expensive and most US dealers have a major brand they represent and use Jungheinrich as a back up or fill in.