Is Keepa or CamelCamelCamel better for finding Amazon discounts?

I'm trying to grab a Vitamix A3500 for my moms 60th birthday which is literally next Tuesday so I'm in a huge rush to find a legit discount. I've been obsessing over price trackers because I cant justify spending $650 when I know it goes on sale, but I'm stuck between Keepa and CamelCamelCamel. I read that Camel is easier to use for beginners but then I saw a thread saying Keepa is way more accurate for lightning deals and warehouse options. My logic was that Camel would be fine but now I'm worried it misses those quick price drops that only last an hour.

I have a $450 budget strictly and I need something that pings my phone immediately. I'm looking for:

• fastest notification speed
• accuracy for Prime-only deals
• ease of use on mobile

I tried setting up an alert on Camel but the interface feels a bit dated compared to Keepa... although Keepa has so many data points it actually makes my head spin. I saw Keepa tracks "Buy Box" prices which people say is important but does that actually matter for a regular shopper? I'm just confused if Keepa's free version is enough or if I'm missing out by not using their premium stuff. Does one actually update faster than the other? I really need to pull the trigger by Sunday at the latest or it wont arrive in time...