Checchino Dal 1887vsRoscioli
Both establishments are rated very highly by professionals. Overall, Checchino Dal 1887 scores slightly better than Roscioli. Checchino Dal 1887 has a TripExpert Score of 85 with recommendations from 11 reviewers including Frommer's, DK Eyewitness and Fodor's.
Checchino Dal 1887
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Via di Monte Testaccio, 30, Rome
From $0/night
 "Checchino remains an example of a classic, family-run Roman restaurant, with one of the best wine cellars in the region." Full review
 "The place for an authentic old-time family atmosphere, plus Roman cuisine of the offal variety." 
 "A pig’s whisker from the city’s former slaughterhouse, Checchino is one of the grander restaurants specialising in the quinto quarto (fifth quarter – or insides of the animal)." Full review
 "Checchino is a traditional Roman restaurant originally opened in 1887 by the Mariani family." Full review
4.0
 "“If you are an adventurous eater”, you’ll appreciate this family-owned “institution” in Testaccio (the old slaughterhouse area) that’s been turning “any part of an animal” into a “delicacy"." Full review
 "This century-old, family-owned trattoria adjoins Monte Testaccio, an imposing mound of pottery shards piled up over 500 years by Roman slaves." Full review
 "Checchino dal 1887 specializes in traditional cucina romana, using the quarto quinto (offal)." 
 "Right in the heart of Monte Testaccio's bars and clubs, this is a historic - and expensive - symbol of Testaccio cookery." 
 "The Mariani family's historic restaurant is Rome's leading temple of authentic cucina romana." Full review
 "Come for the pots of tomatoey tripe and decent local wine list (rare in this area).
" Full review
Roscioli
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via dei Giubbonari 21-22, 00186 Rome
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 "Near Campo De' Fiori (a magnet for young Romans at night), the Roscioli family has turned their long-standing bakery and grocery store into destinations for food and wine aficionados. For..." 
 "More like a Caravaggio painting than a place of business, this food shop and wine bar is dark and decadent." Full review
 "This deli-cum-restaurant has long had rave reviews for the quality of its authentic produce and its inventive food combinations." 
 "The name Roscioli has long been a byword for foodie excellence, and this luxurious deli-restaurant is the place to experience it." Full review
 "Off-the-track branch of this splendid deli-bakery-pizzeria, with delish pizza al taglio , pasta dishes and other goodies that make it ideal for a swift lunch or picnic stock-up." Full review
 "Pierluigi Roscioli bakes the greatest pizza bianca in Rome at his traditional family bakery." Full review
 Star
 "Is it a deli, a wine bar or fully fledged restaurant? Actually it's all three, and you can either just have a glass of wine and some cheese or go for the full menu." 
 "Although quite a few Roman wine shops are in the habit of laying out tables for lunch and (sometimes) dinner, Roscioli is the first of the city's butchers to do so." Full review
 "Foodies flock to this specialty food and wine shop-cum-restaurant." Full review
 " Start with a selection of cured meats and a plate of burrata, then move on to spaghetti alla carbonara, one of the best in town, therefore the world. " Full review