So I plan on getting some Apple Watches as gifts for Christmas and I wanted to know what the difference is between Series 2 and 3 (non LTE) is? Best Buy has the Series 2 on sale for $229 (38mm) and $259 (42mm) and I’m not seeing too many differences compared with the Series 3 (non LTE) other than - - Series 3 has faster processor - Series 3 Siri can talk - Series 3 has Barometric altimeter Are there any other differences? If not, Series 2 seems like a winner to me (with the sale) since I’d be saving $200 since I’m buying 2 gifts. Also - does Series 2 have a “stronger” backside/heart rate monitor than Series 3 (non LTE)? Thanks!