I prefer you to consult an endodontist for both teeth, as the 13 if have sound roots even with complete destructed crown structure , it can be saved by endodontic posts/endodontic implants too..
you have silver posts in canal of 14 which makes tooth repeat RCT difficult..
sorry i cant view your RADIOGRAPH..
after the endodontist suggestion you can go for treatment in both teeth..
if he suggests extraction, then
yes Implants are best option, in anterior teeth you can have immediate loading also.. but it is always preferred to be loaded later after osseointegration
of implants to increase its success rate ..