I would be shocked if for $150/month and as a private individual not an employer that you will be able to get the same coverage as RAMQ. I have attached the enhanced policy details which is the top line policy for visitors available to purchase as a private Individual and it doesn’t cover normal pregnancy. You can’t trust a customer service agent. You need to read the fine print of the policy. I haven’t spent a ton of time looking at all the policies available to visitors to Canada through all insurance companies so I would be interested to see what policy the customer service agent is referring to. If you look at the 3 policies from Manulife none will cover normal pregnancy.I called Manulife and the person said it's basically RAMQ coverage, without the card.
https://www.manulife.ca/content/dam/consumer-portal/documents/en/travel/visitor-to-canada-enhanced-policye.pdf